Support RFC 8693 token exchange for enterprise IdP flows (SEP-990) (#… #3126

Job	Run time
checks / docs	35s
checks / readme-snippets	12s
checks / test (3.10, locked, windows-latest)	1m 47s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.10, locked, ubuntu-latest)	1m 13s
checks / pre-commit	44s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 13s
checks / test (3.13, locked, ubuntu-latest)	1m 1s
checks / test (3.14, lowest-direct, windows-latest)	1m 33s
checks / test (3.10, lowest-direct, windows-latest)	1m 44s
checks / test (3.11, locked, windows-latest)	1m 56s
checks / test (3.13, locked, windows-latest)	1m 45s
checks / test (3.13, lowest-direct, windows-latest)	2m 19s
checks / test (3.12, lowest-direct, windows-latest)	1m 48s
checks / test (3.12, locked, ubuntu-latest)	1m 14s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 13s
checks / test (3.11, locked, ubuntu-latest)	1m 9s
checks / test (3.12, locked, windows-latest)	1m 29s
checks / test (3.14, locked, windows-latest)	2m 37s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.11, lowest-direct, windows-latest)	2m 1s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 16s
all-green	6s
	33m 30s

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