Remove devices after creating them while scanning the I2C bus. Resolves dotnet#2031

This reverts commit 11b5d35.

see discussion in dotnet#2032

resolves dotnet#2031

This commit is also an opportunity to re-run tests in the CI pipeline

This commit demonstrates how to scan the I2C bus for addresses devices acknowledge.

Before the fix discussed in dotnet#2032, this scan would leave the i2c bus in a bad state such that reading/writing to devices after the scan would throw null reference exceptions.

This reduces load on the garbage collector. Note that `_i2cBus` should not be set to null at this time, as per discussion in dotnet#2032

This reverts commit 7b4f08e.

adds CreateDeviceNoCheck() and RemoveDeviceNoCheck() to mimic behaviors found in UnixI2cBus.cs

Also creates a new used address hash set when CreateDevice() is called (not when the bus is instantiated), consistent with how the Unix I2C bus does it

https://github.com/dotnet/iot/blob/main/src/System.Device.Gpio/System/Device/I2c/UnixI2cBus.cs

consistent with how the Unix I2C device class does it

https://github.com/dotnet/iot/blob/main/src/System.Device.Gpio/System/Device/I2c/Devices/UnixI2cDevice.cs

currently demonstrates the issue described by dotnet#2031 and dotnet#2032

expected to fail with a null reference exception due to a bug described by dotnet#2031 and dotnet#2032

fails, demonstrating issue discussed in dotnet#2031 and dotnet#2032

This reverts commit 72e2ea0.

fixes issues described in dotnet#2031 and dotnet#2032

suggested by pgrawehr in dotnet#2032

dotnet#2032

so Microsoft.NET.ApiCompat.ValidatePackage.targets will pass after 3dfa427

it has been replaced by Ft232HI2cDevice