Feature:add loop count command line input to CXL host exerciser

[anandaravuri]

• add loop count command line input and set read /write config
• set FPGA / host read and write cache miss opcode to RD_LINE_I /WR_LINE_I

[coveralls]

Pull Request Test Coverage Report for Build 7024776232

• 0 of 25 (0.0%) changed or added relevant lines in 2 files are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.06%) to 67.621%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
samples/cxl_host_exerciser/he_cache_test.h	0	2	0.0%
samples/cxl_host_exerciser/cxl_he_cache_cmd.h	0	23	0.0%
<!--	Total:	0	25	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
samples/cxl_host_exerciser/cxl_he_cache_cmd.h	4	0.0%
<!--	Total:	4		-->

Totals
Change from base Build 6909983629:	-0.06%
Covered Lines:	15755
Relevant Lines:	23299

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💛 - Coveralls