[FR]: Default cacheDirectory to TEST_TMPDIR

[sallustfire]

What is the current behavior?

Jest provides a config option cacheDirectory which specifies where intermediate file system outputs are written such as transformations or haste map. If left unspecified, the default is approximately ${os.tmpdir()}/jest_${process.uid}. The contents of this directory are not deleted when jest exits and files are written even when --no-cache is set.

Describe the feature

Bazel's TEST_TMPDIR should be integrated to set the jest cacheDirectory in the generated configuration.

• TEST_TMPDIR in Bazel is available to every test action as an ENV. The directory is writable, guaranteed to be empty, and unique to a given test target.
• This enforces hermeticity at the file system level between different jest_test targets and brings rules_jest more in line with the bazel test specification.
• TEST_TMPDIR can either be provided via CLI flag via "make variable" expansion or set in the generated config template by reading from process.env.

[gregmagolan]

More context on Bazel Slack: https://bazelbuild.slack.com/archives/C04281DTLH0/p1706234301711269