Add some audits for some low-hanging fruit (#4836)

I looked through some of our smaller dependencies to vet them and add an
audit for them. These were the ones that were all "obviously correct" to
me before I ran out of steam reviewing other crates.

supply-chain/config.toml

@@ -54,10 +54,6 @@ criteria = "safe-to-deploy"
 version = "0.1.53"
 criteria = "safe-to-deploy"
 
-[[exemptions.atty]]
-version = "0.2.14"
-criteria = "safe-to-deploy"
-
 [[exemptions.autocfg]]
 version = "0.1.8"
 criteria = "safe-to-deploy"
@@ -106,10 +102,6 @@ criteria = "safe-to-deploy"
 version = "0.25.0"
 criteria = "safe-to-deploy"
 
-[[exemptions.cap-rand]]
-version = "0.25.0"
-criteria = "safe-to-deploy"
-
 [[exemptions.cap-std]]
 version = "0.25.0"
 criteria = "safe-to-deploy"
@@ -118,10 +110,6 @@ criteria = "safe-to-deploy"
 version = "0.25.0"
 criteria = "safe-to-run"
 
-[[exemptions.cap-time-ext]]
-version = "0.25.0"
-criteria = "safe-to-deploy"
-
 [[exemptions.capstone]]
 version = "0.9.0"
 criteria = "safe-to-deploy"
@@ -326,10 +314,6 @@ criteria = "safe-to-deploy"
 version = "0.10.1"
 criteria = "safe-to-deploy"
 
-[[exemptions.file-per-thread-logger]]
-version = "0.1.5"
-criteria = "safe-to-deploy"
-
 [[exemptions.filecheck]]
 version = "0.5.0"
 criteria = "safe-to-deploy"
@@ -382,10 +366,6 @@ criteria = "safe-to-run"
 version = "0.12.1"
 criteria = "safe-to-deploy"
 
-[[exemptions.heck]]
-version = "0.4.0"
-criteria = "safe-to-deploy"
-
 [[exemptions.hermit-abi]]
 version = "0.1.19"
 criteria = "safe-to-deploy"
@@ -438,10 +418,6 @@ criteria = "safe-to-deploy"
 version = "2.5.0"
 criteria = "safe-to-deploy"
 
-[[exemptions.is-terminal]]
-version = "0.3.0"
-criteria = "safe-to-deploy"
-
 [[exemptions.is_ci]]
 version = "1.1.1"
 criteria = "safe-to-deploy"
@@ -526,10 +502,6 @@ criteria = "safe-to-deploy"
 version = "2.5.0"
 criteria = "safe-to-deploy"
 
-[[exemptions.memfd]]
-version = "0.6.1"
-criteria = "safe-to-deploy"
-
 [[exemptions.memmap2]]
 version = "0.2.3"
 criteria = "safe-to-deploy"