next-swc/wasm: Make span start at 0

[kdy1]

This is follow-up of #36482

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	kdy1/next.js parser-span	Change
buildDuration	18s	18.7s	⚠️ +747ms
buildDurationCached	7s	7.1s	⚠️ +109ms
nodeModulesSize	481 MB	481 MB	✓

Page Load Tests Overall increase ✓

	vercel/next.js canary	kdy1/next.js parser-span	Change
/ failed reqs	0	0	✓
/ total time (seconds)	4.045	4.035	-0.01
/ avg req/sec	618.05	619.58	+1.53
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.007	1.938	-0.07
/error-in-render avg req/sec	1245.76	1289.69	+43.93

Client Bundles (main, webpack)

	vercel/next.js canary	kdy1/next.js parser-span	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	28.6 kB	28.6 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.3 kB	72.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	kdy1/next.js parser-span	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	kdy1/next.js parser-span	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	308 B	308 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	3.08 kB	3.08 kB	✓
head-HASH.js gzip	359 B	359 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.71 kB	5.71 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.63 kB	2.63 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	391 B	391 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.3 kB	16.3 kB	✓

Client Build Manifests

	vercel/next.js canary	kdy1/next.js parser-span	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	kdy1/next.js parser-span	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General

	vercel/next.js canary	kdy1/next.js parser-span	Change
buildDuration	20.6s	20.7s	⚠️ +57ms
buildDurationCached	7s	7s	⚠️ +22ms
nodeModulesSize	481 MB	481 MB	✓

Page Load Tests Overall increase ✓

	vercel/next.js canary	kdy1/next.js parser-span	Change
/ failed reqs	0	0	✓
/ total time (seconds)	4.057	4.041	-0.02
/ avg req/sec	616.23	618.73	+2.5
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.003	1.952	-0.05
/error-in-render avg req/sec	1247.96	1280.79	+32.83

Client Bundles (main, webpack)

	vercel/next.js canary	kdy1/next.js parser-span	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	29.1 kB	29.1 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.9 kB	72.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	kdy1/next.js parser-span	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	kdy1/next.js parser-span	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	3.08 kB	3.08 kB	✓
head-HASH.js gzip	357 B	357 B	✓
hooks-HASH.js gzip	921 B	921 B	✓
image-HASH.js gzip	5.76 kB	5.76 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.74 kB	2.74 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	392 B	392 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.4 kB	16.4 kB	✓

Client Build Manifests

	vercel/next.js canary	kdy1/next.js parser-span	Change
_buildManifest.js gzip	457 B	457 B	✓
Overall change	457 B	457 B	✓

Rendered Page Sizes

	vercel/next.js canary	kdy1/next.js parser-span	Change
index.html gzip	527 B	527 B	✓
link.html gzip	541 B	541 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.59 kB	1.59 kB	✓

Commit: f67470d