@actions/cache Does not support busybox tar

Describe the bug
Using @actions/cache to create a tar file fails when tar is provided by busybox.

To Reproduce
Steps to reproduce the behavior:

1. Create a github workflow that specifies a container for the job (container must be lightweight and use busybox)
2. Use actions/cache in the same job that has the task defined (actions/cache action uses @actions/cache from the toolkit)
3. In action results, look in the post cache step.

Expected behavior
Cache should be populated correctly.

Screenshots
error message that tar doesn't support posix

Example job output

Post job cleanup.
/usr/bin/docker exec  33e75c0db157510df1fc1234ba47c2f781180acf2df39a513342f51b2b1458af sh -c "cat /etc/*release | grep ^ID"
/bin/tar --posix -z -cf cache.tgz -P -C /__w/st2_installer.ansible/st2_installer.ansible --files-from manifest.txt
/bin/tar: unrecognized option: posix
BusyBox v1.31.1 () multi-call binary.

Usage: tar c|x|t [-ZzJjahmvokO] [-f TARFILE] [-C DIR] [-T FILE] [-X FILE] [--exclude PATTERN]... [FILE]...

Create, extract, or list files from a tar file

	c	Create
	x	Extract
	t	List
	-f FILE	Name of TARFILE ('-' for stdin/out)
	-C DIR	Change to DIR before operation
	-v	Verbose
	-O	Extract to stdout
	-m	Don't restore mtime
	-o	Don't restore user:group
	-k	Don't replace existing files
	-Z	(De)compress using compress
	-z	(De)compress using gzip
	-J	(De)compress using xz
	-j	(De)compress using bzip2
	-a	(De)compress using lzma
	-h	Follow symlinks
	-T FILE	File with names to include
	-X FILE	File with glob patterns to exclude
	--exclude PATTERN	Glob pattern to exclude
Warning: Tar failed with error: The process '/bin/tar' failed with exit code 1

Host:

• OS: Linux (ubuntu-latest in github-actions)
• Version: Whatever github actions is using

Container:
The container that failed for me: yokogawa/ansible-lint:v4.3.7

Additional context
You can see my workflow and job run here:
https://github.com/cognifloyd/st2_installer.ansible/runs/1394562360?check_suite_focus=true
https://github.com/cognifloyd/st2_installer.ansible/actions/runs/361132480/workflow#L50-L57

Start with the post cache step and the /bin/tar --posix invocation shown in the issue, then reproduce it using the provided lightweight BusyBox container workflow. Done means the cache is populated successfully without the BusyBox tar error.