Skip unstable modal test

[driskull]

Test type

e2e

Which Component(s)

modal

Unstable Tests

"emits when duration is set to 0"

Test error, if applicable

@esri/calcite-components:test: Summary of all failing tests
@esri/calcite-components:test: FAIL src/components/modal/modal.e2e.ts (66.694 s)
@esri/calcite-components:test:   ● opening and closing behavior › emits when duration is set to 0
@esri/calcite-components:test: 
@esri/calcite-components:test:     expected event "calciteModalBeforeOpen" to have been called 1 times, but was called 0 time
@esri/calcite-components:test: 
@esri/calcite-components:test:       291 |     await openSpy;
@esri/calcite-components:test:       292 |
@esri/calcite-components:test:     > 293 |     expect(beforeOpenSpy).toHaveReceivedEventTimes(1);
@esri/calcite-components:test:           |                           ^
@esri/calcite-components:test:       294 |     expect(openSpy).toHaveReceivedEventTimes(1);
@esri/calcite-components:test:       295 |
@esri/calcite-components:test:       296 |     await page.evaluate(() => {
@esri/calcite-components:test: 
@esri/calcite-components:test:       at Object.<anonymous> (src/components/modal/modal.e2e.ts:293:27)
@esri/calcite-components:test: 
@esri/calcite-components:test: 
@esri/calcite-components:test: Test Suites: 1 failed, 1 skipped, 117 passed, 118 of 119 total

PR skipped, if applicable

#7274

Additional Info

No response

[Elijbet]

This was refactored as part of #7258.