feat: base64 default for sast analysis

[soniqua]

• Follows CONTRIBUTING rules

What does this PR do?

• Removes any configuration related to the base64Encoding flag
• Updates code-client, wherein base64 Encoding of Snyk Code payloads is enabled by default
• Removes any tests written for the inclusion of the base64Encoding flag

Where should the reviewer start?

• Changes for sast plugins.

How should this be manually tested?

• Run a snyk code test command using the locally built CLI and ensure payloads are gzipped/encoded on transmission (can see from either debug logs or an intermediate proxy).

Any background context you want to provide?

What are the relevant tickets?

• NEBULA-540

Screenshots

Additional questions

[stepsize]

This PR modifies files linked to issues tracked in Stepsize. You might want to review their status, priority, and scope.

✅  2 http libraries in CLI

• src/lib/plugins/sast/analysis.ts

Created from GitHub PR snyk/snyk/#2826

• src/lib/plugins/sast/analysis.ts

_{Mention [stepsize] in a comment if you'd like to report some technical debt. See examples here.}

[github-actions]

	Warnings
⚠️	Since the CLI is unifying on a standard and improved tooling, we're starting to migrate old-style imports and exports to ES6 ones. A file you've modified is using either module.exports or require(). If you can, please update them to ES6 import syntax and export syntax. Files found: test/jest/unit/snyk-code/snyk-code-test.spec.ts

Generated by 🚫 dangerJS against 369fe11

[stepsize]

This PR modifies files linked to issues tracked in Stepsize. You might want to review their status, priority, and scope.

✅  2 http libraries in CLI

• src/lib/plugins/sast/analysis.ts

Created from GitHub PR snyk/snyk/#2826

• src/lib/plugins/sast/analysis.ts

_{Mention [stepsize] in a comment if you'd like to report some technical debt. See examples here.}