* Drop write lock on sysvars
* adds env var for demoting sysvar write lock demotion
* moves demote logic to is_writable
* feature gates sysvar write lock demotion
* adds builtins to write lock demotion
* adds system program id to builtins
* adds Feature111...
* adds an abi-freeze test
* mvines set of builtin program keys
Co-authored-by: Michael Vines <mvines@gmail.com>
* update tests
* adds bpf loader keys
* Add test sysvar
* Plumb demote_sysvar to is_writable
* more plumbing of demote_sysvar_write_locks to is_writable
* patches test_program_bpf_instruction_introspection
* hard codes demote_sysvar_write_locks to false for serialization/encoding methods
* Revert "hard codes demote_sysvar_write_locks to false for serialization/encoding methods"
This reverts commit ae3e2d2e777437bddd753933097a210dcbc1b1fc.
* change the hardcoded ones to demote_sysvar_write_locks=true
* Use data_as_mut_slice
Co-authored-by: behzad nouri <behzadnouri@gmail.com>
Co-authored-by: Michael Vines <mvines@gmail.com>
