Support RFC 8693 token exchange for enterprise IdP flows (SEP-990) #3043

Job	Run time
checks / readme-snippets	15s
checks / pre-commit	46s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.12, lowest-direct, windows-latest)	1m 50s
checks / test (3.10, locked, ubuntu-latest)	1m 9s
checks / test (3.10, locked, windows-latest)	1m 36s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.12, locked, ubuntu-latest)	1m 10s
checks / test (3.11, lowest-direct, windows-latest)	2m 7s
checks / test (3.12, locked, windows-latest)	1m 35s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 4s
checks / test (3.10, lowest-direct, windows-latest)	1m 36s
checks / test (3.11, locked, windows-latest)	1m 43s
checks / test (3.11, locked, ubuntu-latest)	1m 2s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.14, locked, windows-latest)	2m 21s
checks / test (3.13, locked, windows-latest)	2m 27s
checks / test (3.13, locked, ubuntu-latest)	59s
checks / test (3.14, lowest-direct, windows-latest)	1m 33s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.13, lowest-direct, windows-latest)	1m 44s
checks / test (3.14, locked, ubuntu-latest)	2m 0s
all-green	3s
	31m 22s

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