bazelversion: pin to 6.4.0

- add bazelversion
- bump bazelisk

rational: until #865 and #931 are addressed we can't really upgrade to 7.0
PiperOrigin-RevId: 590391115

.bazelversion

@@ -0,0 +1 @@
+6.4.0

.github/workflows/continuous-integration.yml

@@ -37,7 +37,7 @@ jobs:
 
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-linux-amd64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"

.github/workflows/nightly-fuzz.yml

@@ -27,7 +27,7 @@ jobs:
           restore-keys: bazel-cache-20_04-
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-linux-amd64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"

.github/workflows/nightly-macos.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-darwin-arm64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-darwin-arm64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-darwin-arm64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"

.github/workflows/nightly-ubuntu-22.04.yml

@@ -28,7 +28,7 @@ jobs:
         run: sudo apt-get install python3-distutils python3-dev python-is-python3 libtinfo5  build-essential liblapack-dev libblas-dev gfortran
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-linux-amd64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"

.github/workflows/one-bazel-test-ubuntu-20.04.yml

@@ -38,7 +38,7 @@ jobs:
           restore-keys: bazel-cache-20_04-
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-linux-amd64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"

.github/workflows/one-bazel-test-ubuntu-22.04.yml

@@ -38,7 +38,7 @@ jobs:
           restore-keys: bazel-cache-22_04-
       - name: Install bazelisk
         run: |
-          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.18.0/bazelisk-linux-amd64"
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
           mkdir -p "${GITHUB_WORKSPACE}/bin/"
           mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
           chmod +x "${GITHUB_WORKSPACE}/bin/bazel"