[jdk17u-dev] RFR: 8282684: Obsolete UseContainerCpuShares and PreferContainerQuotaForCPUCount flags

[SendaoYan]

Hi all,

This backport PR remove obsolete UseContainerCpuShares and PreferContainerQuotaForCPUCount flags. These flags are deprecated in JDK 19 for [JDK-8281181](https://bugs.openjdk.org/browse/JDK-8281181), and [JDK-8281181](https://bugs.openjdk.org/browse/JDK-8281181) has been backported to jdk17u-dev and jdk11u-dev, so I think it will be useful to backport [JDK-8282684](https://bugs.openjdk.org/browse/JDK-8282684) to jdk17u-dev and jdk117u-dev.

Additional testing:

- [ ] All the docker tests

-------------

Commit messages:
 - Remove "int share  = UseContainerCpuShares ? cpu_shares() : -1;"
 - Backport db772276848f6ad2d4d13e892bcd0eb3123d030f

Changes: https://git.openjdk.org/jdk17u-dev/pull/4266/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4266&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8282684
  Stats: 115 lines in 4 files changed: 0 ins; 103 del; 12 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4266.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4266/head:pull/4266

PR: https://git.openjdk.org/jdk17u-dev/pull/4266