test(api): add tests for axios interceptors

[asdolo]

What does this do?

1. Add missing tests for Axios interceptors.
2. Update SonarQube config to ignore *.spec.ts, *.spec.tsx and *.test.ts files from analysis: it was only ignoring *.test.tsx files before this change.

Why did you do this?

1. Because SonarQube was complaining about some untested code for the interceptors.
2. Because it makes no sense to analyse test files.

Who/what does this impact?

N/A

How did you test this?

Running the new tests locally.

[github-actions]

💯 Test Coverage

Lines	Statements	Branches	Functions
	43.02% (219/509)	37.28% (85/228)	29.89% (58/194)

😎 Tests Results

Tests	Skipped	Failures	Errors	Time
52	0 💤	0 ❌	0 🔥	27.211s ⏱️

👀 Tests Details • (44%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	43.02	37.28	29.89	44.21
api/common	64.44	35	53.33	66.66
axios.d.ts	0	0	0	0

[asdolo]

Closed on behalf of #34.