feat(core): Rename hasTracingEnabled to hasSpansEnabled

[Lms24]

This PR renames the hasTracingEnabled utility function to hasSpansEnabled. The original name is causing confusion and doesn't represent what the function actually does: determining if the SDK is configured to record spans. This function does not check if trace propagation without span recording (or "Tracing without Performance") is enabled (which it basically always is).

Since this function is exported from @sentry/core, hasTracingEnabled was deprecated and will be removed in v10.

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	22.9 KB	+0.03%	+5 B 🔺
@sentry/browser - with treeshaking flags	22.77 KB	+0.04%	+8 B 🔺
@sentry/browser (incl. Tracing)	35.77 KB	-	-
@sentry/browser (incl. Tracing, Replay)	72.58 KB	-0.01%	-1 B 🔽
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	66.13 KB	+0.01%	+3 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	76.82 KB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	89.56 KB	+0.01%	+2 B 🔺
@sentry/browser (incl. Feedback)	39.84 KB	+0.02%	+7 B 🔺
@sentry/browser (incl. sendFeedback)	27.53 KB	+0.02%	+4 B 🔺
@sentry/browser (incl. FeedbackAsync)	32.31 KB	+0.03%	+7 B 🔺
@sentry/react	24.73 KB	+0.02%	+5 B 🔺
@sentry/react (incl. Tracing)	37.67 KB	+0.01%	+1 B 🔺
@sentry/vue	27.09 KB	+0.01%	+1 B 🔺
@sentry/vue (incl. Tracing)	37.47 KB	-0.01%	-1 B 🔽
@sentry/svelte	23.03 KB	+0.03%	+5 B 🔺
CDN Bundle	24.2 KB	+0.01%	+1 B 🔺
CDN Bundle (incl. Tracing)	35.92 KB	+0.01%	+2 B 🔺
CDN Bundle (incl. Tracing, Replay)	70.56 KB	+0.01%	+2 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	75.7 KB	+0.01%	+3 B 🔺
CDN Bundle - uncompressed	70.76 KB	-0.01%	-4 B 🔽
CDN Bundle (incl. Tracing) - uncompressed	106.64 KB	-0.01%	-4 B 🔽
CDN Bundle (incl. Tracing, Replay) - uncompressed	217.49 KB	-0.01%	-4 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	230.06 KB	-0.01%	-4 B 🔽
@sentry/nextjs (client)	38.63 KB	-	-
@sentry/sveltekit (client)	36.28 KB	-0.01%	-2 B 🔽
@sentry/node	156.51 KB	-0.01%	-4 B 🔽
@sentry/node - without tracing	97.52 KB	-	-
@sentry/aws-serverless	107 KB	-0.01%	-4 B 🔽

View base workflow run

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
698	1	697	301

View the full list of 1 ❄️ flaky tests

sdk.test.ts SDK-internal behavior › Injects fetch proxy script for SvelteKit<2.16.0

Flake rate in main: 30.00% (Passed 14 times, Failed 6 times)

Stack Traces | 0.126s run time

sdk.test.ts:4:3 Injects fetch proxy script for SvelteKit<2.16.0

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[Lms24]

Side-note: I went through every usage call we make to this function while renaming and 1. the conditions now read way more clearer and 2. I didn't come acrross suspicios usages where this check doesn't seem applicable.