Add support for lm_head to adapter models

[EricLBuehler]

No description provided.

[github-actions]

Code Metrics Report

  ===============================================================================
 Language            Files        Lines         Code     Comments       Blanks
===============================================================================
 C Header                2           35           28            0            7
 Dockerfile              1           34           25            0            9
 Happy                   1          442          369            0           73
 JSON                   11          102          101            0            1
 Python                 40         1562         1346           46          170
 TOML                   19          557          491           11           55
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 Jupyter Notebooks       2            0            0            0            0
 |- Markdown             2           77           32           31           14
 |- Python               2          196          169            1           26
 (Total)                            273          201           32           40
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 Markdown               23         1812            0         1367          445
 |- BASH                 5          101           98            0            3
 |- JSON                 1           12           12            0            0
 |- Python               5           92           82            0           10
 |- Rust                 6          407          364           19           24
 |- TOML                 2           75           63            0           12
 (Total)                           2499          619         1386          494
-------------------------------------------------------------------------------
 Rust                  169        54310        49313          957         4040
 |- Markdown            91          848           13          785           50
 (Total)                          55158        49326         1742         4090
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 Total                 269        58854        51673         2381         4800
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[EricLBuehler]

Looks good