Fix spans for lifted lambda idents

[swernli]

This change gets rid of the default span on lifted lambda names by setting it to the entire lamba. This ends up working well with error and lints that try to underline the lambda, which previously could end up highlighting the first character (sometimes of the wrong file).

Before:

After:

[github-actions]

Benchmark for 0a78bbd

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Test	Base	PR	%
Array append evaluation	338.5±4.00µs	338.8±2.91µs	+0.09%
Array literal evaluation	185.9±1.08µs	169.6±5.36µs	-8.77%
Array update evaluation	415.3±5.18µs	415.9±7.15µs	+0.14%
Core + Standard library compilation	21.9±0.18ms	21.9±0.28ms	0.00%
Deutsch-Jozsa evaluation	5.0±0.11ms	4.9±0.06ms	-2.00%
Large file parity evaluation	34.1±0.10ms	34.1±0.10ms	0.00%
Large input file compilation	13.7±0.15ms	14.0±0.42ms	+2.19%
Large input file compilation (interpreter)	51.2±1.16ms	51.5±1.26ms	+0.59%
Large nested iteration	32.9±0.76ms	32.7±0.46ms	-0.61%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1557.0±28.92µs	1600.7±31.09µs	+2.81%
Perform Runtime Capabilities Analysis (RCA) on large file sample	7.9±0.09ms	7.9±0.07ms	0.00%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1423.8±49.77µs	1460.5±35.41µs	+2.58%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	27.7±0.22ms	28.0±0.34ms	+1.08%
Teleport evaluation	93.6±3.70µs	94.4±4.75µs	+0.85%

[github-actions]

Benchmark for 6a610df

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Test	Base	PR	%
Array append evaluation	337.9±4.51µs	335.3±2.58µs	-0.77%
Array literal evaluation	186.7±2.76µs	186.5±0.90µs	-0.11%
Array update evaluation	415.5±3.75µs	413.7±1.04µs	-0.43%
Core + Standard library compilation	22.6±0.76ms	22.3±0.56ms	-1.33%
Deutsch-Jozsa evaluation	5.0±0.05ms	5.0±0.06ms	0.00%
Large file parity evaluation	34.2±0.11ms	34.4±0.89ms	+0.58%
Large input file compilation	14.2±0.45ms	14.0±0.31ms	-1.41%
Large input file compilation (interpreter)	53.6±2.22ms	54.1±1.76ms	+0.93%
Large nested iteration	32.8±0.24ms	32.5±0.19ms	-0.91%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1571.6±61.79µs	1567.7±44.39µs	-0.25%
Perform Runtime Capabilities Analysis (RCA) on large file sample	8.0±0.10ms	7.9±0.09ms	-1.25%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1430.4±43.31µs	1432.1±54.08µs	+0.12%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	28.0±0.42ms	27.8±0.39ms	-0.71%
Teleport evaluation	94.2±4.30µs	94.3±3.63µs	+0.11%