Improved Monitor&WD handling in DeviceBootloader

[themarpe]

Fixes a rare case of infinite wait time upon creation of Device (or DeviceBootloader), if a device had an connectivity/booting issue

Diff is rather large due to the main "try catch" block adding identation, but it boils down to spinning up the Monitor&WD combo between each BL interaction, not just upon connecting to the main BL.

Bug was easily reproducible by placing a 5s sleep between:

          // Device already in bootloader mode.
            // Connect without booting
            connection = std::make_shared<XLinkConnection>(deviceInfo, X_LINK_BOOTLOADER);

            // If type is specified, try to boot into that BL type
            stream = std::make_unique<XLinkStream>(connection, bootloader::XLINK_CHANNEL_BOOTLOADER, bootloader::XLINK_STREAM_MAX_SIZE);

// <-- add 5s sleep

            // Retrieve bootloader version
            version = requestVersion();

Then boot device, wait for sleep section and disconnect before "requestVersion".

Affected mostly ETH based devices