[chore](workflow) Improve the cache hit ratio in BE UT (Clang)

[adonis0147]

Proposed changes

In workflow BE UT (Clang), we set up the ldb_toolchain before we build the UT. During generating the toolchain tools, the script modifies the RPATH and dynamic linker of the executables which making the mtime of compilers change in every build.

By default, Ccache computes the hash of the compilers' mtime and size to check the compilers whether they are consistent with the ones which were used to generate the caches. If the compilers change, the caches can not be hit. We should change the default behavior of Ccache by setting the configuration compiler_check (CCACHE_COMPILERCHECK) to increase the cache hit ratio in the workflow.

Reference: https://ccache.dev/manual/latest.html#_configuration_options

compiler_check (CCACHE_COMPILERCHECK)
By default, ccache includes the modification time (“mtime”) and size of the compiler in the hash to ensure that results retrieved from the cache are accurate. If compiler plugins are used, these plugins will also be added to the hash. This option can be used to select another strategy. Possible values are:

content
Hash the content of the compiler binary. This makes ccache very slightly slower compared to mtime, but makes it cope better with compiler upgrades during a build bootstrapping process.

mtime
Hash the compiler’s mtime and size, which is fast. This is the default.

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[adonis0147]

run buildall

[BiteTheDDDDt]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.

[morningman]

LGTM