OKTA-815132 Update Azure AD to Entra ID for IdP docs

[vanngo-okta]

Description:

• What's changed? Update Azure AD to Entra ID for IdP docs and stack selector.
• Is this PR related to a Monolith release? No

Resolves:

• OKTA-815132

[eng-info-dev-github-bot]

Netlify Preview URL for the changes: https://preview-5147--reverent-murdock-829d24.netlify.app

[acrolinxdevdocs-okta]

Acrolinx score

A minimum Acrolinx Score of 80 is required. The total score is an average of the subscores.

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Article	Total score Required:80	Word and phrases (Brand, terms) Preferred: 80	Correctness (Spelling, grammar) Preferred: 80	Clarity (Readability) Preferred: 80	Inclusive language (+ accesibility) Preferred: 80
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/accountlink.md	100	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/accountlinking2.md	100	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/afterappidpinokta.md	96	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/appatidp.md	86	54	82	82	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/appidpinokta.md	84	72	72	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/createidpnote.md	85	40	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/idp.md	100	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/idpaccount.md	88	100	16	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/idpoption.md	100	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/entra/useidpsignin.md	100	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/index.md	86	46	72	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/oktatookta/appatidp.md	86	37	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/add-an-external-idp/main/openidconnect/appatidp.md	96	100	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/identity-providers/index.md	81	49	100	100	100
✅ packages/@okta/vuepress-site/docs/guides/social-login/main/index.md	81	55	64	80	100
✅ packages/@okta/vuepress-site/docs/guides/social-login/main/microsoft/appidpinokta.md	92	49	100	100	100

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