build: upgrade go to 1.15.11

Pick up fixes to the following Go bugs:

* golang/go#45076
* golang/go#45187
* golang/go#42884

* [ ] Adjust the Pebble tests to run in new version.
* [x] Adjust version in Docker image ([source](./builder/Dockerfile)).
* [x] Rebuild and push the Docker image (following [Basic Process](#basic-process))
* [x] Bump the version in `WORKSPACE` under `go_register_toolchains`. You may need to bump [rules_go](https://github.com/bazelbuild/rules_go/releases).
* [x] Bump the version in `builder.sh` accordingly ([source](./builder.sh#L6)).
* [ ] Bump the version in `go-version-check.sh` ([source](./go-version-check.sh)), unless bumping to a new patch release.
* [ ] Bump the go version in `go.mod`. You may also need to rerun `make vendor_rebuild` if vendoring has changed.
* [x] Bump the default installed version of Go in `bootstrap-debian.sh` ([source](./bootstrap/bootstrap-debian.sh#L40-42)).
* [x] Replace other mentions of the older version of go (grep for `golang:<old_version>` and `go<old_version>`).
* [ ] Update the `builder.dockerImage` parameter in the TeamCity [`Cockroach`](https://teamcity.cockroachdb.com/admin/editProject.html?projectId=Cockroach&tab=projectParams) and [`Internal`](https://teamcity.cockroachdb.com/admin/editProject.html?projectId=Internal&tab=projectParams) projects.
* [x] Adjust `GO_VERSION` in the TeamCity agent image ([setup script](./packer/teamcity-agent.sh))
  and ask the Developer Infrastructure team to deploy new images.

Resolves #63836.

Release note (general change): Upgrade the CRDB binary to Go 1.15.10

WORKSPACE

@@ -108,7 +108,7 @@ load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_depe
 
 go_rules_dependencies()
 
-go_register_toolchains(go_version = "1.15.10")
+go_register_toolchains(go_version = "1.15.11")
 
 # Configure nodeJS.
 load("@build_bazel_rules_nodejs//:index.bzl", "yarn_install")

build/bootstrap/bootstrap-debian.sh

@@ -46,9 +46,9 @@ sudo tar -C /usr -zxf /tmp/cmake.tgz && rm /tmp/cmake.tgz
 
 # Install Go.
 trap 'rm -f /tmp/go.tgz' EXIT
-curl -fsSL https://dl.google.com/go/go1.15.10.linux-amd64.tar.gz > /tmp/go.tgz
+curl -fsSL https://dl.google.com/go/go1.15.11.linux-amd64.tar.gz > /tmp/go.tgz
 sha256sum -c - <<EOF
-4aa1267517df32f2bf1cc3d55dfc27d0c6b2c2b0989449c96dd19273ccca051d /tmp/go.tgz
+8825b72d74b14e82b54ba3697813772eb94add3abf70f021b6bdebe193ed01ec /tmp/go.tgz
 EOF
 sudo tar -C /usr/local -zxf /tmp/go.tgz && rm /tmp/go.tgz
 

build/builder.sh

@@ -3,7 +3,7 @@
 set -euo pipefail
 
 image=cockroachdb/builder
-version=20210330-194147
+version=20210419-170223
 
 function init() {
   docker build --tag="${image}" "$(dirname "${0}")/builder"

build/builder/Dockerfile

@@ -235,8 +235,8 @@ RUN curl -fsSL https://github.com/Kitware/CMake/releases/download/v3.17.0/cmake-
 # releases of Go will no longer be run in CI once it is changed. Consider
 # bumping the minimum allowed version of Go in /build/go-version-chech.sh.
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends golang \
- && curl -fsSL https://storage.googleapis.com/golang/go1.15.10.src.tar.gz -o golang.tar.gz \
- && echo 'c1dbca6e0910b41d61a95bf9878f6d6e93d15d884c226b91d9d4b1113c10dd65 golang.tar.gz' | sha256sum -c - \
+ && curl -fsSL https://storage.googleapis.com/golang/go1.15.11.src.tar.gz -o golang.tar.gz \
+ && echo 'f25b2441d4c76cf63cde94d59bab237cc33e8a2a139040d904c8630f46d061e5 golang.tar.gz' | sha256sum -c - \
  && tar -C /usr/local -xzf golang.tar.gz \
  && rm golang.tar.gz \
  && cd /usr/local/go/src \

build/packer/teamcity-agent.sh

@@ -42,9 +42,9 @@ apt-get install --yes \
   pass \
   unzip
 
-curl -fsSL https://dl.google.com/go/go1.15.10.linux-amd64.tar.gz > /tmp/go.tgz
+curl -fsSL https://dl.google.com/go/go1.15.11.linux-amd64.tar.gz > /tmp/go.tgz
 sha256sum -c - <<EOF
-4aa1267517df32f2bf1cc3d55dfc27d0c6b2c2b0989449c96dd19273ccca051d /tmp/go.tgz
+8825b72d74b14e82b54ba3697813772eb94add3abf70f021b6bdebe193ed01ec /tmp/go.tgz
 EOF
 tar -C /usr/local -zxf /tmp/go.tgz && rm /tmp/go.tgz
 

pkg/cmd/roachtest/go_helpers.go

@@ -18,13 +18,13 @@ const goPath = `/mnt/data1/go`
 // "node".
 func installGolang(ctx context.Context, t *test, c *cluster, node nodeListOption) {
 	if err := repeatRunE(
-		ctx, c, node, "download go", `curl -fsSL https://dl.google.com/go/go1.15.10.linux-amd64.tar.gz > /tmp/go.tgz`,
+		ctx, c, node, "download go", `curl -fsSL https://dl.google.com/go/go1.15.11.linux-amd64.tar.gz > /tmp/go.tgz`,
 	); err != nil {
 		t.Fatal(err)
 	}
 	if err := repeatRunE(
 		ctx, c, node, "verify tarball", `sha256sum -c - <<EOF
-4aa1267517df32f2bf1cc3d55dfc27d0c6b2c2b0989449c96dd19273ccca051d /tmp/go.tgz
+8825b72d74b14e82b54ba3697813772eb94add3abf70f021b6bdebe193ed01ec /tmp/go.tgz
 EOF`,
 	); err != nil {
 		t.Fatal(err)