[subinterpreters] Global C variables are a problem

@vsajip

BPO	36876
Nosy	@vsajip, @vstinner, @tiran, @phsilva, @ericsnowcurrently, @soltysh, @pablogsal, @sweeneyde
PRs	bpo-36876: Avoid static locals. #13372 bpo-36876: Use a consistent variable name for kwlist. #13531 bpo-36876: Make some static string literal arrays constant. #15760 bpo-36876: Add a tool that identifies unsupported global C variables. #15877 bpo-36876: Skip test_check_c_globals for now. #16017 bpo-36876: Fix the globals checker tool. #16058 bpo-36876: Moved Parser/listnode.c statics to interpreter state. #16328 bpo-36876: Re-organize the c-analyzer tool code. #16841 bpo-36876: Fix the C analyzer tool. #22841 bpo-36876: Small adjustments to the C-analyzer tool. #23045 bpo-36876: [c-analyzer tool] Tighten up the results and output. #23431 bpo-36876: [c-analyzer tool] Add a "capi" subcommand to the c-analyzer tool. #23918 bpo-36876: [c-analyzer tool] Additional CLI updates for "capi" command. #23929 bpo-36876: Update the c-analyzer whitelist. #31225 bpo-36876: Minor cleanup to c-analyzer "ignored" data.' #31239 bpo-36876: Make sure the c-analyzer is checking all the source files.' #31264

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/ericsnowcurrently' closed_at = None created_at = <Date 2019-05-10.19:01:42.087> labels = ['expert-subinterpreters', 'type-bug', '3.8'] title = '[subinterpreters] Global C variables are a problem' updated_at = <Date 2022-02-10.23:14:23.025> user = 'https://github.com/ericsnowcurrently'

bugs.python.org fields:

activity = <Date 2022-02-10.23:14:23.025> actor = 'eric.snow' assignee = 'eric.snow' closed = False closed_date = None closer = None components = ['Subinterpreters'] creation = <Date 2019-05-10.19:01:42.087> creator = 'eric.snow' dependencies = [] files = [] hgrepos = [] issue_num = 36876 keywords = ['patch'] message_count = 22.0 messages = ['342119', '342125', '352013', '352032', '352063', '352085', '352208', '354928', '356181', '357351', '357352', '357353', '368910', '379390', '379999', '381511', '383698', '383778', '393785', '412886', '412957', '413029'] nosy_count = 8.0 nosy_names = ['vinay.sajip', 'vstinner', 'christian.heimes', 'phsilva', 'eric.snow', 'maciej.szulik', 'pablogsal', 'Dennis Sweeney'] pr_nums = ['13372', '13531', '15760', '15877', '16017', '16058', '16328', '16841', '22841', '23045', '23431', '23918', '23929', '31225', '31239', '31264'] priority = 'normal' resolution = None stage = 'patch review' status = 'open' superseder = None type = 'behavior' url = 'https://bugs.python.org/issue36876' versions = ['Python 3.8']