Fix illegal checksum configuration in compatibility-test-for-newer-releases

compatibility-test-for-newer-releases failed on Compatibility tests

Host: ec2-34-237-51-14.compute-1.amazonaws.com
Project: WiredTiger (develop)
Commit: diff: WT-7752 Update packing code according to documentation (#6776)

• Remove Java type from the schema doc

• Remove the use of long type in packing

• Add a comment about argument promotion

• Add note about l and L cases | 14 Jul 21 23:47 UTC
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Task Logs (compatibility-test-for-newer-releases)