bugfix: RandomIdGenerator can generate invalid Span/Trace Ids

[zhihali]

Description

This PR updates the RandomIdGenerator class to ensure that it generates valid span and trace IDs by avoiding specific invalid values.

Fixes #3921

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

I wrote 2 new tests for this one, when it generate a invalid id(for example: 0), the generate function will run again.

• tox -e py38-opentelemetry-sdk

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Charlie-lizhihan / name: Fools (c05ebc1, 534b25b, b049e2a, 5618966, 7104095, a317c5e, 60a7722, 5a8179e, fb5dff6)

[emdneto]

Lint job is failing. I suggest you setup pre-commit which can help avoid that. See CONTRIBUTING.md