Add adapter activation support for Gemma 2 LoRA

[EricLBuehler]

No description provided.

[github-actions]

Code Metrics Report

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 Language            Files        Lines         Code     Comments       Blanks
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 Dockerfile              1           34           25            0            9
 Happy                   1          442          369            0           73
 JSON                    9           21           21            0            0
 Python                 32         1256         1075           37          144
 TOML                   16          444          403            1           40
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 Jupyter Notebooks       1            0            0            0            0
 |- Markdown             1           60           30           22            8
 |- Python               1           96           87            1            8
 (Total)                            156          117           23           16
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 Markdown               19         1371            0         1026          345
 |- BASH                 5          101           98            0            3
 |- Python               5           98           88            0           10
 |- Rust                 3          151          135            6           10
 (Total)                           1721          321         1032          368
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 Rust                  122        38347        34686          694         2967
 |- Markdown            59          669           13          618           38
 (Total)                          39016        34699         1312         3005
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 Total                 202        41915        36579         1758         3578
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