fix(agora): fix shared-typescript-angular-charts:test target after Angular update (AG-1610)

[hallieswan]

Description

Fixes the shared-typescript-angular-charts:test target that was failing after the monorepo update to Angular 19, see discussion here.

Example output from nx run shared-typescript-angular-charts:test:

 PASS   shared-typescript-charts-angular  libs/shared/typescript/charts-angular/src/lib/boxplot/boxplot.directive.spec.ts (5.366 s)
  BoxplotDirective
    ✓ should render no data placeholder when no data is passed (369 ms)
    ✓ should render boxplot with static summaries (133 ms)
    ✓ should render boxplot with dynamic summaries (101 ms)

----------------------|---------|----------|---------|---------|-------------------
File                  | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------------------|---------|----------|---------|---------|-------------------
All files             |     100 |      100 |     100 |     100 |                   
 boxplot.directive.ts |     100 |      100 |     100 |     100 |                   
----------------------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests:       3 passed, 3 total
Snapshots:   0 total
Time:        6.997 s, estimated 10 s
Ran all test suites.

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 NX   Successfully ran target test for project shared-typescript-charts-angular (196ms)