fix(template-parser): add missing Conditional and its keys to VisitorKeys

[rafaelss95]

When working on #444, I realized that this key was missing and it was a little difficult to make the rules work correctly without a lot of effort.

Relates to #280 (comment).

[codecov]

Codecov Report

Merging #445 (971ba62) into master (5f4e4a8) will decrease coverage by 0.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #445      +/-   ##
==========================================
- Coverage   66.05%   65.82%   -0.24%     
==========================================
  Files          15       14       -1     
  Lines         604      591      -13     
  Branches      120      118       -2     
==========================================
- Hits          399      389      -10     
+ Misses        152      150       -2     
+ Partials       53       52       -1     

Impacted Files	Coverage Δ
packages/builder/src/utils/eslint-utils.ts

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 971ba62. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

Status	Command
	nx run-many --target=build --all --parallel
	nx run-many --target=check-configs --all --parallel
	nx run-many --target=test --all --parallel
	nx run-many --target=typecheck --all --parallel

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[JamesHenry]

Great, thanks!