Update Bazel to 1.1.0 and replace bazelisk by a direct download

This pins the version and avoids the need to redownload the binary
each time the container is recreated.

The .bazelversion file was bazelisk-specific and is no longer needed.

Test Plan:
Rebuilt the container, ran `scripts:launch`.

Modifying the checksum caused to build to fail.

X-Origin-Diff: phab/D211
GitOrigin-RevId: ec9ec2b97c6555a676f6444ac3923fad34b2cd16
diff --git a/scripts/bin/bazel b/scripts/bin/bazel
index 6ea1638..c0bd7e4 100755
--- a/scripts/bin/bazel
+++ b/scripts/bin/bazel
@@ -2,4 +2,4 @@
 set -euo pipefail
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-$DIR/../run_in_container.sh bazelisk $@
\ No newline at end of file
+$DIR/../run_in_container.sh bazel $@