RFR: 8327379: Make TimeLinearScan a develop flag [v2]

[Denghui Dong]

> Hi,
> 
> Please help review this change that makes TimeLinearScan a develop flag.
> 
> Currently, TimeLinearScan is only used in code guarded by '#ifndef PRODUCT'. We should move it to develop or maybe notproduct.

Denghui Dong has updated the pull request incrementally with one additional commit since the last revision:

  update header

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18125/files
  - new: https://git.openjdk.org/jdk/pull/18125/files/6706a1e9..a242dc19

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18125&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18125&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18125.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18125/head:pull/18125

PR: https://git.openjdk.org/jdk/pull/18125