Deprecate --ssh flag

[ArinGhazarian]

Closes #265

Because of the latest BE changes and the fact that the problems we had with https are now resolved, we can deprecate the --ssh flag and use https permanently. For backward compatibility, we are not going to remove it completely just yet so passing it will do noting (keep using https) and log a warning to notify the user.

ado2gh generate-script output with --ssh

./ado2gh generate-script --ado-org aringhazarian --github-org ArinTestOrg --repos-only --ssh 
[7:14 PM] [INFO] Generating Script...
[7:14 PM] [INFO] GITHUB ORG: ArinTestOrg
[7:14 PM] [INFO] ADO ORG: aringhazarian
[7:14 PM] [INFO] OUTPUT: ./migrate.ps1
[7:14 PM] [WARNING] SSH mode is no longer supported. --ssh flag will be ignored.
[7:14 PM] [INFO] ADO Org provided, only processing repos for aringhazarian
[7:14 PM] [INFO] ADO ORG: aringhazarian
[7:14 PM] [INFO]   Team Project: BarProject
[7:14 PM] [INFO]     Repo: BarProject
[7:14 PM] [INFO]     Repo: DragonRepo
[7:14 PM] [INFO]   Team Project: FooProject
[7:14 PM] [INFO]     Repo: JohnRepo
[7:14 PM] [INFO]     Repo: FooProject
[7:14 PM] [INFO]   Team Project: MigrationTestProject

• Did you write/update appropriate tests
• Release notes updated (if appropriate)
• Appropriate logging output
• Issue linked

[github-actions]

Unit Test Results

    1 files  ±  0      1 suites  ±0   14s ⏱️ ±0s
205 tests  - 13  205 ✔️  - 13  0 💤 ±0  0 ❌ ±0 

Results for commit 3974d39. ± Comparison against base commit baca36b.

This pull request removes 13 tests.

OctoshiftCLI.Tests.AdoToGithub.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.AdoToGithub.Commands.GenerateScriptCommandTests.GenerateParallelScript_Single_Repo_Repos_Only_With_Ssh
OctoshiftCLI.Tests.AdoToGithub.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.AdoToGithub.Commands.GenerateScriptCommandTests.Single_Repo_Repos_Only_With_Ssh
OctoshiftCLI.Tests.AdoToGithub.Commands.MigrateRepoCommandTests ‑ OctoshiftCLI.Tests.AdoToGithub.Commands.MigrateRepoCommandTests.Retries_When_Hosts_Error_And_Wait_Is_On
OctoshiftCLI.Tests.AdoToGithub.Commands.MigrateRepoCommandTests ‑ OctoshiftCLI.Tests.AdoToGithub.Commands.MigrateRepoCommandTests.With_Ssh
OctoshiftCLI.Tests.GithubApiTests ‑ OctoshiftCLI.Tests.GithubApiTests.CreateAdoMigrationSource_Using_Ssh
OctoshiftCLI.Tests.GithubApiTests ‑ OctoshiftCLI.Tests.GithubApiTests.CreateGhecMigrationSource_Using_Ssh
OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests.Ado_With_Ssh
OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests.GenerateParallelAdoScript_Single_Repo_With_Ssh
OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests.GenerateParallelGithubScript_Single_Repo_With_Ssh
OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests ‑ OctoshiftCLI.Tests.GithubEnterpriseImporter.Commands.GenerateScriptCommandTests.Github_With_Ssh
…

♻️ This comment has been updated with latest results.

[dylan-smith]

should add a bullet to release notes for this

[ArinGhazarian]

should add a bullet to release notes for this

Yup :) while I was adding it I noticed that it'd be a good idea to also test for option.IsHidden in the command tests. Adding the ReleaseNotes now 😃

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
Octoshift	86%	61%	213	✔
gei	66%	60%	227	➖
ado2gh	90%	77%	273	✔
Summary	82% (2438 / 2985)	68% (373 / 552)	713	✔