Disable LP048 for ARDUINO_LINT_LIBRARY_MANAGER_INDEXING mode

[per1234]

This rule checks for the presence of the library's library.properties depends items in the library index. Since the
library index is not available when in ARDUINO_LINT_LIBRARY_MANAGER_INDEXING mode, this rule can not run.

Before this change, attempting to lint a library with a library.properties depends field when in ARDUINO_LINT_LIBRARY_MANAGER_INDEXING mode resulted in a panic:

panic: interface conversion: interface {} is nil, not []interface {}

goroutine 1 [running]:
github.com/arduino/arduino-lint/internal/rule/rulefunction.nameInLibraryManagerIndex(0xc000160206, 0x19, 0xddae1d)
        /home/build/internal/rule/rulefunction/library.go:1447 +0x1be
github.com/arduino/arduino-lint/internal/rule/rulefunction.LibraryPropertiesDependsFieldNotInIndex(0xdcd21e, 0x18, 0xc0005a1890)
        /home/build/internal/rule/rulefunction/library.go:1181 +0x224
github.com/arduino/arduino-lint/internal/rule.Runner(0xc0008ea050, 0x1, 0x1)
        /home/build/internal/rule/rule.go:53 +0x2e5
github.com/arduino/arduino-lint/internal/command.ArduinoLint(0xc0000ee580, 0x160b2a0, 0x0, 0x0)
        /home/build/internal/command/command.go:76 +0x219
github.com/spf13/cobra.(*Command).execute(0xc0000ee580, 0xc000088190, 0x0, 0x0, 0xc0000ee580, 0xc000088190)
        /go/pkg/mod/github.com/spf13/cobra@v1.1.1/command.go:854 +0x2a4
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000ee580, 0x0, 0x0, 0x0)
        /go/pkg/mod/github.com/spf13/cobra@v1.1.1/command.go:958 +0x350
github.com/spf13/cobra.(*Command).Execute(...)
        /go/pkg/mod/github.com/spf13/cobra@v1.1.1/command.go:895
main.main()
        /home/build/main.go:32 +0x32

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.34%. Comparing base (609854e) to head (809540a).
⚠️ Report is 1819 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #173   +/-   ##
=======================================
  Coverage   84.34%   84.34%           
=======================================
  Files          43       43           
  Lines        2971     2971           
=======================================
  Hits         2506     2506           
  Misses        373      373           
  Partials       92       92           

Flag	Coverage Δ
unit	84.34% <ø> (ø)

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