fix tgi-entrypoint wrapper in docker file: exec instead of spawning a child process (#2663)

tgi-entrypoint: exec instead of spawning a child process

reason: otherwise parent will receive the signals when we'd like tgi to receive them
keeping the parent/child is not necessary and would require the parent to handle signals to forward them properly to the child
Signed-off-by: Raphael Glon <oOraph@users.noreply.github.com>
Co-authored-by: Raphael Glon <oOraph@users.noreply.github.com>

tgi-entrypoint.sh

@@ -2,4 +2,4 @@
 
 ldconfig 2>/dev/null || echo 'unable to refresh ld cache, not a big deal in most cases'
 
-text-generation-launcher $@
+exec text-generation-launcher $@