Fix error for invalid deku_id generation on generic enum

[wcampbell0x2a]

• Add/Fixup lifetime for generated code for enum ext id finding. Lifetime __deku needs to be added to the deku_id_type, and the impl.

NOTE: I'm not sure if __deku the the best answer, and now ignoring generics is more of a problem of me fixing the problem and the time I have to fix it in a day.

See #408, this also deals with #400

[github-actions]

Benchmark for 620f4ef

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Test	Base	PR	%
deku_read_bits	1115.7±17.37ns	1147.6±16.91ns	+2.86%
deku_read_byte	20.2±0.27ns	20.2±0.40ns	0.00%
deku_read_enum	9.3±0.07ns	9.4±0.12ns	+1.08%
deku_read_vec	53.2±0.87ns	53.7±0.80ns	+0.94%
deku_write_bits	114.3±1.25ns	114.3±1.62ns	0.00%
deku_write_byte	134.5±11.63ns	129.3±5.69ns	-3.87%
deku_write_enum	93.6±3.21ns	91.8±1.66ns	-1.92%
deku_write_vec	3.1±0.06µs	3.1±0.04µs	0.00%

[sharksforarms]

lgtm, a test case would be good for this too

[github-actions]

Benchmark for 2df9a4d

Click to view benchmark

Test	Base	PR	%
deku_read_bits	1208.2±12.66ns	1172.8±50.33ns	-2.93%
deku_read_byte	5.5±0.12ns	5.5±0.06ns	0.00%
deku_read_enum	2.9±0.07ns	2.9±0.06ns	0.00%
deku_read_vec	35.4±1.63ns	35.0±0.34ns	-1.13%
deku_write_bits	202.4±3.80ns	199.3±5.89ns	-1.53%
deku_write_byte	22.0±0.30ns	22.0±0.10ns	0.00%
deku_write_enum	23.5±0.27ns	23.8±1.89ns	+1.28%
deku_write_vec	290.0±2.63ns	288.9±2.39ns	-0.38%

[wcampbell0x2a]

lgtm, a test case would be good for this too

Added!