fix(browser): guard nextHopProtocol when adding resource spans

[AbhiPrasad]

ref #16804

This was addressed with #16806, but we didn't guard every location that uses entry.nextHopProtocol.

Will backport to v9 after merge.

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	23.81 kB	-	-
@sentry/browser - with treeshaking flags	22.54 kB	-	-
@sentry/browser (incl. Tracing)	39.68 kB	+0.02%	+4 B 🔺
@sentry/browser (incl. Tracing, Replay)	77.8 kB	+0.01%	+6 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	67.74 kB	+0.02%	+7 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	82.49 kB	+0.01%	+6 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback)	94.61 kB	+0.01%	+5 B 🔺
@sentry/browser (incl. Feedback)	40.49 kB	-0.01%	-1 B 🔽
@sentry/browser (incl. sendFeedback)	28.5 kB	-	-
@sentry/browser (incl. FeedbackAsync)	33.39 kB	-0.01%	-1 B 🔽
@sentry/react	25.6 kB	-	-
@sentry/react (incl. Tracing)	41.66 kB	+0.01%	+3 B 🔺
@sentry/vue	28.27 kB	-	-
@sentry/vue (incl. Tracing)	41.48 kB	+0.01%	+4 B 🔺
@sentry/svelte	23.83 kB	+0.01%	+1 B 🔺
CDN Bundle	25.36 kB	-	-
CDN Bundle (incl. Tracing)	39.64 kB	+0.02%	+4 B 🔺
CDN Bundle (incl. Tracing, Replay)	75.58 kB	+0.02%	+8 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	81.03 kB	+0.01%	+6 B 🔺
CDN Bundle - uncompressed	74.08 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	117.73 kB	+0.03%	+28 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	231.65 kB	+0.02%	+28 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	244.46 kB	+0.02%	+28 B 🔺
@sentry/nextjs (client)	43.3 kB	+0.01%	+4 B 🔺
@sentry/sveltekit (client)	40.13 kB	+0.02%	+5 B 🔺
@sentry/node	167.87 kB	-	-
@sentry/node - without tracing	100.58 kB	-	-
@sentry/aws-serverless	128.7 kB	-	-

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