[feature](cpu cores)get the cores when running within a cgroup.

[Mryange]

Proposed changes

same in duckdb/duckdb#6519

#  cat /sys/fs/cgroup/cpu/cpu.cfs_quota_us
800000
# cat /sys/fs/cgroup/cpu/cpu.cfs_period_us
100000

pipeline executors_size set |size=8

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...

[doris-robot]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR

[Mryange]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 35.25% (8702/24684)
Line Coverage: 27.09% (71227/262923)
Region Coverage: 26.33% (36937/140262)
Branch Coverage: 23.26% (18900/81270)
Coverage Report: http://coverage.selectdb-in.cc/coverage/c1ae835581bc517abf53252fbc952d901da09dde_c1ae835581bc517abf53252fbc952d901da09dde/report/index.html

[Mryange]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 35.32% (8729/24711)
Line Coverage: 27.14% (71416/263185)
Region Coverage: 26.39% (37066/140430)
Branch Coverage: 23.28% (18942/81376)
Coverage Report: http://coverage.selectdb-in.cc/coverage/b50984a23aed3e4c650fb124fe842c3a0d66b330_b50984a23aed3e4c650fb124fe842c3a0d66b330/report/index.html

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[Mryange]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 35.32% (8729/24714)
Line Coverage: 27.13% (71411/263210)
Region Coverage: 26.38% (37053/140441)
Branch Coverage: 23.28% (18943/81382)
Coverage Report: http://coverage.selectdb-in.cc/coverage/b50984a23aed3e4c650fb124fe842c3a0d66b330_b50984a23aed3e4c650fb124fe842c3a0d66b330/report/index.html

[Mryange]

run buildall

[Mryange]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 35.30% (8730/24731)
Line Coverage: 27.09% (71410/263572)
Region Coverage: 26.34% (37066/140725)
Branch Coverage: 23.23% (18943/81528)
Coverage Report: http://coverage.selectdb-in.cc/coverage/b50984a23aed3e4c650fb124fe842c3a0d66b330_b50984a23aed3e4c650fb124fe842c3a0d66b330/report/index.html