feat: support workload identity auth for Azure #921

Job	Run time
build_under_wasm	55s
build_all_features (ubuntu-latest)	40s
build (ubuntu-latest)	34s
build_all_features (macos-11)	1m 46s
build_single_feature (services-aliyun)	22s
build (macos-11)	1m 33s
build_all_features (windows-latest)	2m 20s
check	34s
build_single_feature (services-aws)	28s
build (windows-latest)	1m 57s
build_single_feature (services-azblob)	36s
test_aws_web_identity	0s
build_single_feature (services-google)	28s
test_gcs_web_identify	0s
test_tencent_cloud_web_identify	0s
build_single_feature (services-huaweicloud)	31s
unit	1m 1s
build_single_feature (services-oracle)	30s
build_single_feature (services-tencent)	37s
	14m 52s

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