libgphoto2: needs help finding libxml2
FormulaInstaller: cleanup check_/audit_ functions.
FormulaInstaller: move Cellar checks to module.
audit: use FormulaCellarChecks module.

Perform post-installation checks if a formula is installed.
Added for brew test-bot to be able to fail on bad Cellar installation.
brew-test-bot: audit after installation.

Enables new post-installation Cellar audit failures.

Closes #21242.
Fix some false-positive build-time dep audits
libgphoto2: add missing dep on gd

Fixes #21196.
Closes #21197.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
subversion 1.8.0 bottles

Closes #20890.
algol68g 2.7

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
antlr 4.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
camlp5 6.10

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
cdo 1.6.1

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
cfitsio 3.350

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
dwdiff 2.0.5

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
ExifTool 9.33

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
getmail 4.41.0

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
iso-codes 3.44

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
LanguageTool 2.2

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
libtrace 3.0.18

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
link-grammar 4.7.14

Signed-off-by: Jack Nagel <jacknagel@gmail.com>