feat(core)!: Update hasTracingEnabled to consider empty trace config

[mydea]

This PR updates the behavior of passing undefined to tracesSampleRate (or enabledTracing). now, this will not trigger TWP, but tracing will be disabled. If you really want TWP, you need to configure tracesSampleRate: 0.

Closes #13262

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	22.89 KB	-0.45%	-104 B 🔽
@sentry/browser - with treeshaking flags	21.63 KB	-0.4%	-87 B 🔽
@sentry/browser (incl. Tracing)	35.47 KB	-0.19%	-67 B 🔽
@sentry/browser (incl. Tracing, Replay)	72.73 KB	-0.1%	-73 B 🔽
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	63.15 KB	-0.14%	-85 B 🔽
@sentry/browser (incl. Tracing, Replay with Canvas)	77.14 KB	-0.09%	-69 B 🔽
@sentry/browser (incl. Tracing, Replay, Feedback)	89.51 KB	-0.1%	-91 B 🔽
@sentry/browser (incl. Feedback)	39.66 KB	-0.28%	-112 B 🔽
@sentry/browser (incl. sendFeedback)	27.54 KB	-0.29%	-82 B 🔽
@sentry/browser (incl. FeedbackAsync)	32.3 KB	-0.26%	-86 B 🔽
@sentry/react	25.67 KB	-0.3%	-79 B 🔽
@sentry/react (incl. Tracing)	38.29 KB	-0.18%	-67 B 🔽
@sentry/vue	27.17 KB	-0.32%	-88 B 🔽
@sentry/vue (incl. Tracing)	37.33 KB	-0.23%	-85 B 🔽
@sentry/svelte	23.08 KB	-0.37%	-87 B 🔽
CDN Bundle	24.27 KB	-0.38%	-94 B 🔽
CDN Bundle (incl. Tracing)	35.82 KB	-0.25%	-89 B 🔽
CDN Bundle (incl. Tracing, Replay)	70.91 KB	-0.14%	-97 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback)	76.1 KB	-0.12%	-89 B 🔽
CDN Bundle - uncompressed	71.18 KB	-0.33%	-241 B 🔽
CDN Bundle (incl. Tracing) - uncompressed	106.65 KB	-0.23%	-241 B 🔽
CDN Bundle (incl. Tracing, Replay) - uncompressed	220.71 KB	-0.11%	-241 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	233.58 KB	-0.11%	-241 B 🔽
@sentry/nextjs (client)	38.59 KB	-0.19%	-75 B 🔽
@sentry/sveltekit (client)	36 KB	-0.22%	-79 B 🔽
@sentry/node	162.04 KB	-0.07%	-109 B 🔽
@sentry/node - without tracing	98.77 KB	-0.13%	-126 B 🔽
@sentry/aws-serverless	128.61 KB	-0.09%	-110 B 🔽

View base workflow run

[codecov]

❌ 3 Tests Failed:

Tests completed	Failed	Passed	Skipped
692	3	689	297

View the top 3 failed tests by shortest run time

pinia.test.ts sends pinia action breadcrumbs and state context

Stack Traces | 30s run time

pinia.test.ts:4:1 sends pinia action breadcrumbs and state context

errors.test.ts sends an error

Stack Traces | 30s run time

errors.test.ts:4:1 sends an error

errors.test.ts sends an error with a parameterized transaction name

Stack Traces | 30s run time

errors.test.ts:32:1 sends an error with a parameterized transaction name

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