Adding more info to CodeCache::printOccupancyStats()

[mpirvu]

OMR::CodeCache::printOccupancyStats() prints to stderr various information about the code cache usage such as:

• Whether it's full or not
• The values for the warmCodeAlloc and coldCodeAlloc pointers
• How much space is available in the hole between warmCodeAlloc and coldCodeAlloc
• The list of freed blocks that are available for reuse

This commit adds a new line of output that shows the sizes of warm and cold sections of the code cache.

[dsouzai]

jenkins build all

[dsouzai]

plinux test failed bcause of

15:43:40  31: free(): invalid next size (normal)
15:43:40  31/31 Test #31: compunittest ......................Child aborted***Exception:   0.76 sec
15:43:40  
15:43:40  97% tests passed, 1 tests failed out of 31
15:43:40  
15:43:40  Total Test time (real) = 482.26 sec
15:43:40  
15:43:40  The following tests FAILED:
15:43:40  	 31 - compunittest (Child aborted)
15:43:40  Errors while running CTest

I don't see an existing open issue for this, but I don't see how the changes in this PR could cause this. Will rerun.

[dsouzai]

jenkins build plinux

[dsouzai]

plinux build error seen in the PR build of #7400, so will merge.