Fixup typos in SDK documentation and examples.

[kataras]

Important misspell fixes. Carefully fixed one by one by hand.

[kataras]

/CC @skmcgrail @skotambkar

Note, the CI test validate no generated code changes test is failing because the generated content had misspellings too, which I fixed them too, in order to no need to rebuild those files using the new misspell-clear generator code. It's safe to leave these tests fail, in the next commit they will not fail. However, contributors are free to edit this PR and clear the generated content's misspell fixes.

[jasdel]

Thanks for submitting this PR @kataras to fixup the typos. We can take all of the changes except for those to the ./models/apis/*/*/doc-2.json files. These files are sourced externally to the SDK, and they need to be updated separately.

I created #3471 to track the API model updates that are needed so those typo fixes aren't lost.

[kataras]

Sounds good @jasdel , I see that you reverted these changed already. Do you need something more by my side so we can proceed with merging? Thanks

[jasdel]

Everything is good, we can merge this in and it will be included in the SDK's next release. Thanks for taking the time to correct these typos!

[kataras]

No worries @jasdel, thanks for accepting it!