Add ID attributes to password field + submit button

[stevehobbsdev]

Changes

This PR adds id attributes to the password input and submit button
components. Other fields had ID attributes to them in #1517, so makes sense to
add them here.

References

Fixes #2067

Testing

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled