kvadmission: carve out package for AC<->KV integration

Pure code movement/renaming. We also renamed a cluster setting
kv.store.admission.provisioned_bandwidth to
kvadmission.store.provisioned_bandwidth.

Release note (general note): We renamed a cluster setting
kv.store.admission.provisioned_bandwidth to
kvadmission.store.provisioned_bandwidth.

docs/generated/settings/settings.html

@@ -63,10 +63,10 @@
 <tr><td><code>kv.snapshot_delegation.enabled</code></td><td>boolean</td><td><code>false</code></td><td>set to true to allow snapshots from follower replicas</td></tr>
 <tr><td><code>kv.snapshot_rebalance.max_rate</code></td><td>byte size</td><td><code>32 MiB</code></td><td>the rate limit (bytes/sec) to use for rebalance and upreplication snapshots</td></tr>
 <tr><td><code>kv.snapshot_recovery.max_rate</code></td><td>byte size</td><td><code>32 MiB</code></td><td>the rate limit (bytes/sec) to use for recovery snapshots</td></tr>
-<tr><td><code>kv.store.admission.provisioned_bandwidth</code></td><td>byte size</td><td><code>0 B</code></td><td>if set to a non-zero value, this is used as the provisioned bandwidth (in bytes/s), for each store. It can be over-ridden on a per-store basis using the --store flag</td></tr>
 <tr><td><code>kv.transaction.max_intents_bytes</code></td><td>integer</td><td><code>4194304</code></td><td>maximum number of bytes used to track locks in transactions</td></tr>
 <tr><td><code>kv.transaction.max_refresh_spans_bytes</code></td><td>integer</td><td><code>4194304</code></td><td>maximum number of bytes used to track refresh spans in serializable transactions</td></tr>
 <tr><td><code>kv.transaction.reject_over_max_intents_budget.enabled</code></td><td>boolean</td><td><code>false</code></td><td>if set, transactions that exceed their lock tracking budget (kv.transaction.max_intents_bytes) are rejected instead of having their lock spans imprecisely compressed</td></tr>
+<tr><td><code>kvadmission.store.provisioned_bandwidth</code></td><td>byte size</td><td><code>0 B</code></td><td>if set to a non-zero value, this is used as the provisioned bandwidth (in bytes/s), for each store. It can be over-ridden on a per-store basis using the --store flag</td></tr>
 <tr><td><code>schedules.backup.gc_protection.enabled</code></td><td>boolean</td><td><code>true</code></td><td>enable chaining of GC protection across backups run as part of a schedule</td></tr>
 <tr><td><code>security.ocsp.mode</code></td><td>enumeration</td><td><code>off</code></td><td>use OCSP to check whether TLS certificates are revoked. If the OCSP server is unreachable, in strict mode all certificates will be rejected and in lax mode all certificates will be accepted. [off = 0, lax = 1, strict = 2]</td></tr>
 <tr><td><code>security.ocsp.timeout</code></td><td>duration</td><td><code>3s</code></td><td>timeout before considering the OCSP server unreachable</td></tr>

pkg/BUILD.bazel

@@ -1142,6 +1142,7 @@ GO_TARGETS = [
     "//pkg/kv/kvserver/idalloc:idalloc_test",
     "//pkg/kv/kvserver/intentresolver:intentresolver",
     "//pkg/kv/kvserver/intentresolver:intentresolver_test",
+    "//pkg/kv/kvserver/kvadmission:kvadmission",
     "//pkg/kv/kvserver/kvserverbase:kvserverbase",
     "//pkg/kv/kvserver/kvserverpb:kvserverpb",
     "//pkg/kv/kvserver/liveness/livenesspb:livenesspb",
@@ -2439,6 +2440,7 @@ GET_X_DATA_TARGETS = [
     "//pkg/kv/kvserver/gc:get_x_data",
     "//pkg/kv/kvserver/idalloc:get_x_data",
     "//pkg/kv/kvserver/intentresolver:get_x_data",
+    "//pkg/kv/kvserver/kvadmission:get_x_data",
     "//pkg/kv/kvserver/kvserverbase:get_x_data",
     "//pkg/kv/kvserver/kvserverpb:get_x_data",
     "//pkg/kv/kvserver/liveness:get_x_data",

pkg/kv/kvserver/BUILD.bazel

@@ -132,6 +132,7 @@ go_library(
         "//pkg/kv/kvserver/gc",
         "//pkg/kv/kvserver/idalloc",
         "//pkg/kv/kvserver/intentresolver",
+        "//pkg/kv/kvserver/kvadmission",
         "//pkg/kv/kvserver/kvserverbase",
         "//pkg/kv/kvserver/kvserverpb",
         "//pkg/kv/kvserver/liveness",

pkg/kv/kvserver/kvadmission/BUILD.bazel

@@ -0,0 +1,24 @@
+load("//build/bazelutil/unused_checker:unused.bzl", "get_x_data")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "kvadmission",
+    srcs = ["kvadmission.go"],
+    importpath = "github.com/cockroachdb/cockroach/pkg/kv/kvserver/kvadmission",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//pkg/roachpb",
+        "//pkg/settings",
+        "//pkg/settings/cluster",
+        "//pkg/util/admission",
+        "//pkg/util/admission/admissionpb",
+        "//pkg/util/buildutil",
+        "//pkg/util/log",
+        "//pkg/util/stop",
+        "//pkg/util/timeutil",
+        "@com_github_cockroachdb_errors//:errors",
+        "@com_github_cockroachdb_pebble//:pebble",
+    ],
+)
+
+get_x_data(name = "get_x_data")