chore(deps): update rust crate config to 0.15.0

[red-hat-konflux]

This PR contains the following updates:

Package	Type	Update	Change
config	workspace.dependencies	minor	0.14.1 -> 0.15.0

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Release Notes

rust-cli/config-rs (config)

v0.15.18

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Fixes

• Improve consistency between missing field error messages

v0.15.17

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Features

• corn file format support

v0.15.16

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Performance

• Allow more build parallelism by depending on serde_core

v0.15.15

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Fixes

• (json5) Correctly deserialize null (regressed in 0.15.14)

v0.15.14

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Performance

• (json5) Reduce overhead when loading json5 files

v0.15.13

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Fixes

• Skip UTF-8 BOMs when reading files

v0.15.12

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Performance

• Upgrade to toml v0.9

v0.15.11

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Features

• Deserialize YAML real keys as strings

v0.15.10

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Features

• Deserialize YAML boolean keys as strings

Fixes

• Don't panic on non-string YAML keys

v0.15.9

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Compatibility

• Upgrade to yaml-rust2 0.10

Documentation

• Provided more jumping off points in the documentation

v0.15.8

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Fix

• Don't panic on non-unicode env variable names and values

v0.15.7

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Internal

• Update a dependency

v0.15.6

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Fixes

• Fix regression from 0.15.3 with reading a table from an empty config

v0.15.5

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Fixes

• Include the key on all serde errors

Performance

• Don't clone when merging sources

v0.15.4

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Performance

• Reduce TOML build times

v0.15.3

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Fixes

• Fix regression from 0.15.3 with reading a table from an empty config

v0.15.2

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Fixes

• Provide an error message on path parsing errors (regression from 0.15.0)
• Improve quality of path parsing error messages

v0.15.1

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Fixes

• Improve consistency between missing field error messages

v0.15.0

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Compatibility

• ConfigError is no longer exhaustive
• ConfigError::Parses type changed
• FileFormat is no longer exhaustive
• Deprecated functions removed
• Case insensitivity from 0.14.0 was reverted

Fixes

• Struct fields, variants, and lookup paths with uppercase letters can be used again (regression from 0.14.0)

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Configuration

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