Refactor password field validation and restyle

[lukaw3d]

I tried to make validation part of the input field, so that onSubmit doesn't need to re-check validity of every input field. But then error-specific-styling doesn't work contentProps={{ border: props.error ? 'bottom' : false }}.

Before	After

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	5		0	0.01s
✅ REPOSITORY	checkov	yes		no	15.85s
✅ REPOSITORY	git_diff	yes		no	0.0s
✅ TSX	eslint	4	0	0	6.86s

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[codecov]

Codecov Report

Merging #1081 (821c8a8) into master (7114b6f) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1081      +/-   ##
==========================================
+ Coverage   88.69%   88.75%   +0.05%     
==========================================
  Files         102      102              
  Lines        1778     1778              
  Branches      412      411       -1     
==========================================
+ Hits         1577     1578       +1     
+ Misses        201      200       -1     

Flag	Coverage Δ
cypress	60.57% <100.00%> (ø)
jest	78.86% <100.00%> (+0.05%)	⬆️

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Impacted Files	Coverage Δ
src/app/components/PasswordField/index.tsx	87.50% <100.00%> (-1.39%)	⬇️
...s/OpenWalletPage/Features/FromPrivateKey/index.tsx	100.00% <100.00%> (ø)
src/app/lib/key.ts	100.00% <0.00%> (+6.25%)	⬆️

[buberdds]

It looks like these type changes do not belong to this PR. I don't see any use cases for optional value and onChange or TFormValue here.

[lukaw3d]

The new recommended usage is with name and validate, but value, onChange, error still come useful. And keeping them is consistent with grommet's FormField.

I added some tests to validate both uses