Pure wasmi 036 (#1442)

This is a _much_ simpler alternative to #1434 -- though it cribs some
code from there -- focused on the cruder strategy of "just ship two
sorobans in core", with soroban 22 not being able to replay soroban 21
contracts precisely, but soroban 21 being linked-in to core to handle
such replay.

This makes the task here dramatically simpler -- just adapt to API
changes in wasmi and recalibrate -- with a certain amount more work to
do on the core side, but not a ton.

.github/workflows/rust.yml

@@ -73,7 +73,7 @@ jobs:
     strategy:
       matrix:
         rust: [msrv, latest]
-        test-protocol: [20, 21]
+        test-protocol: [22]
         sys:
         - os: ubuntu-latest
           target: wasm32-unknown-unknown

Cargo.toml

@@ -20,15 +20,15 @@ exclude = ["soroban-test-wasms/wasm-workspace"]
 # NB: When bumping the major version make sure to clean up the
 # code guarded by `unstable-*` features to make it enabled
 # unconditionally.
-version = "21.2.0"
-rust-version = "1.74.0"
+version = "22.0.0"
+rust-version = "1.79.0"
 
 [workspace.dependencies]
-soroban-env-common = { version = "=21.2.0", path = "soroban-env-common", default-features = false }
-soroban-env-guest = { version = "=21.2.0", path = "soroban-env-guest" }
-soroban-env-host = { version = "=21.2.0", path = "soroban-env-host" }
-soroban-env-macros = { version = "=21.2.0", path = "soroban-env-macros" }
-soroban-builtin-sdk-macros = { version = "=21.2.0", path = "soroban-builtin-sdk-macros" }
+soroban-env-common = { version = "=22.0.0", path = "soroban-env-common", default-features = false }
+soroban-env-guest = { version = "=22.0.0", path = "soroban-env-guest" }
+soroban-env-host = { version = "=22.0.0", path = "soroban-env-host" }
+soroban-env-macros = { version = "=22.0.0", path = "soroban-env-macros" }
+soroban-builtin-sdk-macros = { version = "=22.0.0", path = "soroban-builtin-sdk-macros" }
 # NB: this must match the wasmparser version wasmi is using
 wasmparser = "=0.116.1"
 
@@ -41,9 +41,10 @@ default-features = false
 
 [workspace.dependencies.wasmi]
 package = "soroban-wasmi"
-version = "=0.31.1-soroban.20.0.1"
+version = "=0.36.0-soroban.22.0.0"
 git = "https://github.com/stellar/wasmi"
-rev = "0ed3f3dee30dc41ebe21972399e0a73a41944aa0"
+rev = "122a74a7c491929e5ac9de876099154ef7c06d06"
+features = ["no-hash-maps"]
 
 # [patch."https://github.com/stellar/rs-stellar-xdr"]
 # stellar-xdr = { path = "../rs-stellar-xdr/" }