modules/* : remove unused configure options and review modules that were still compiled with -O2 as opposed to -Os

[tlaurion]

Note: is libusb still needed by anything? gpg2 doesn't require it anymore? Review

[tlaurion]

user@heads-tests-deb12:/tmp$ wget https://output.circle-artifacts.com/output/job/d4015c6a-b47d-44d4-8bb7-a092af4e88b3/artifacts/0/build/x86/x230-hotp-maximized/sizes.txt -O PR -q
user@heads-tests-deb12:/tmp$ wget https://output.circle-artifacts.com/output/job/ca627a62-547e-42cd-8efb-a2b750622cac/artifacts/0/build/x86/x230-hotp-maximized/sizes.txt -O master -q
user@heads-tests-deb12:/tmp$ diff -u master PR
--- master	2023-08-22 12:33:03.000000000 -0400
+++ PR	2023-08-23 16:27:53.000000000 -0400
@@ -1,4 +1,4 @@
-2023-08-22 12:23:55-04:00 d8a9a1e77e1731302e5b464b789c872a78e738c4 clean
+2023-08-23 16:14:03-04:00 1d80dead78dbc016675a9c3f9009df01fe5f37e5 clean
  2486400:/root/project/build/x86/x230-hotp-maximized/bzImage
   685056:/root/project/build/x86/x230-hotp-maximized/modules.cpio
 -----
@@ -146,5 +146,5 @@
      924:./sbin/config-dhcp.sh
     1064:./sbin/insmod
 -----
- 4219392:build/x86/x230-hotp-maximized/initrd.cpio.xz
-12582912:/root/project/build/x86/x230-hotp-maximized/heads-x230-hotp-maximized-v0.2.0-1753-gd8a9a1e.rom
+ 4218880:build/x86/x230-hotp-maximized/initrd.cpio.xz
+12582912:/root/project/build/x86/x230-hotp-maximized/heads-x230-hotp-maximized-v0.2.0-1754-g1d80dea.rom

Analysis: compression is better while all binaries/libs else stays the same ? This is weird.
Minor gains but still: 4219392-4218880=512bytes.